English Reference
noun

boiler

n.
US /ˈbɔɪɫɝ/ UK /bˈɔɪlɐ/ boil·er UK spelling boilers

  1. 01 B1 Intermediate

    a machine that heats water to provide heat and hot water for a house or building.

    a domestic or industrial device used to heat water or produce steam, typically for central heating or hot water supply.

    Simple

    The house was freezing because the boiler broke down during the night.

    In context

    The landlord agreed to replace the aging gas boiler with a more energy-efficient model before the winter temperatures arrived.

  2. 02 B2 Upper Intermediate Cooking

    a large pot or container used for boiling or steaming food.

    a large vessel or container designed for boiling, steaming, or heating food items in bulk.

    Simple

    We used a large boiler to cook enough corn for the whole party.

    In context

    The industrial kitchen was equipped with several stainless steel boilers for preparing large quantities of soup and stock.

  3. 03 C2 Proficiency British EnglishSlangVulgar

    a very rude and old-fashioned way to describe an older woman you think is unattractive.

    a derogatory and offensive slang term used to describe an older woman, often implying she is unattractive or unpleasant.

    Simple

    He was being very rude and called the neighbour an old boiler.

    In context

    The comedian's use of the term 'old boiler' was widely criticised for being both sexist and outdated.

    Teacher's tip

    This term is considered highly offensive and sexist in modern British English; learners should recognize it but never use it.

    hagcrone

Etymology 1

From boil + -er.

Etymology 2

Shortening of boilerplate

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B1 · Intermediate
Frequency Frequent
Updated